The world's richest nations have pledged to crack down on people who illegally chop down trees and destroy the environment.
The group - called G8 - made the pledge after a two-day meeting in Derby. It's the latest move in the fight against third world poverty.
The chopping down of trees - called logging - is being done without permission in some poor countries.
It has a devastating effect on the local wildlife and ruins the forest.
The G8 countries - including the US and Russia - have agreed to clamp down on people who break the law and to fight corruption.
Countries will be helped to catch offenders using the latest technology.
Countries which import timber will also be asked to take more responsibility for where their supplies come from.